Bookkeeping machine



Aug. 25, 1936. u

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E. BREITLING BOOKKEEPING MACHINE Filed March 12, 1931 15 Sheets-Sheet 2 Aug. 25, 1936. .f E. 'BREITLING 2,052,444

, BQOKKEEPING MACHINE l Filed March 12,- 1931 l 15 Sheets-Sheet 3 Aug.v 25, 1936. E. BREITLING v 2,052,444

- BOOKKEEPING MACHINE l I Fild March l2, '1931l 15 'Sheets-Sheet 4 A il?. 11a.

7 Mirad/b9 Meel; coupled //lo Mee/1s cazz/ded $5 I yg Aug. 25, 1936. E. BREITLING 2,052,444

BOOKKEEP ING MACHINE Filed March 12, 1931 l5 Sheets-Sheet 5 Aug- 25, 1936. E. BREITLING 2,052,444

BOOKKEEPING MACHINE Filed March l2, 1931 l5 Sheets-Sheet 6 Aug. 25, 1936. E. BREITLING BOOKKEEPING MACHINE Filed March l2, 1951 15 Sheets-Sheet 7 Aug. 25, 1936. E." BREITLING 2,052,444

BOOKKEEPING MACHINE Filed March 12,v 1931 15 sheets-sheet 8 VIII.

NTT IIIIUII IHI Aug. 25, 1936.L E. BREITLING .I BOOKKEEPING MQCHINE Filed March l2, 1931 l5 Sheets-.Sheet 9 Aug. 25, 1936. E. BREITLING u -BOOKKEEPING MACHINE Filgad March l2, 1931 15 Sheets-Sheet 10 0/0 ba/ance Aug. z5, 1936.

E. BREITLING A2,052,444 BOOKKEEPING MACHINE Filed March l2, 1931 15 Sheets-Sheelt 11 /obabnce 204 Aug. 25, 1936. BREITLING BOOKKEEPING MACHINE Filed March 12,1951

l5 Sheets-Sheet l 2 Aug. 25, 1936. E. BREITLING BOOKKEEPING MACHINE Filed March 12, 1951 15 Sheets-Sheet 13 F 28 zgn o 17g m f58 Aug. 25, 1936. E. BREITLIG I 2,052,444

BOOKKEEPING MACHINE Filed March 12,-1931 15 Sheets-Sheet 14 Aug. 25, 1936. E. BREITLING .BOOKKEEPING MACHINE 15 sheets-sheet '15 Filed March 12, 1931 Patented Aug. A25, 1936 BOOKKEEPING MACHINE Ernst Breitling, Essen, Germany, assignor, by -mesne assignments, to The ,National Cash Register Co., Dayton, Ohio, a corporation of Maryland Application March 12, 1931, 'serial Nn. 522,053 In Germany July 12, 1930 44 Claims.

The invention relates to a book-keeping machine intended for the calculation and recording of new balances resulting from old balances of an account and the amounts received and paid out. A balance mechanism, which in known manner comprises two kinds of counting wheels, viz. adding and subtracting wheels, serves for the calculation of the new balances.

I'he invention resides inthe fact that in all booking operations the coupling of the adding or subtracting wheels with the differential wheels is effected immediately by the depression of the motor key. The selection of the adding or subtracting side of the balance mechanism in the machine operations, serving to record the amounts set up on the keyboard (old balance, amounts paid in or out) takes place simultaneously with the depression ofva key by which a control totalizer is thrown into operation. The keys paid in and paid out of these control totalizer's serve iurther to unlock keys that serve to throw secondary totalizers for debit and credit accounts into cooperation.

vIn taking the total from the balance mechanism (new balance) the coupling of the adding or subtracting side selected in the preceding machine operation by the balance mechanism itself is prepared by setting a balance lever and is carried out by depression of the motor key, that is without vany special maniplations, the respective one of the two control totalizers which serves to accumulate-new negative or positive amounts being likewise selected automatically and coupled and the respective printing character being selected and printed. y

On taking totals only one totalizer may be coupled. In taking the total from one of the totalizers the balance mechanism normally coupled therewith by depressing the motor key is uncoupled. According to the invention this is eiected by setting the kind-of operation lever.

The amount accumulated in the balance mechanism may be-positive or negative, the positive amounts being accumulated in the adding wheels, while the negative amounts are accumulated in the subtracting wheels. Both these sets of wheels thus may. work alternatively as main counting wheels or as companion complementary wheels. As the two wheels o! each order are in .a set positionwhich is complementary to 9, and every complementary amount in the companion counting wheels is always by one unit smaller than the decada] complementary amount requiredfor the execution of the subtracting operation by addition of the complementary amounts, in the passage of the total accumulated in the balance mechanism from positive into negative condition or inversely, that 1s upon the counting wheels changing, the unit failing in the companion counting wheels is added by a correcting mecha- 5 nism which upon the number 99999 being exceeded causes in the'companion counting wheels a transfer of the l-correction to the units order, while upon the number 99999 being exceeded in the main counting wheels, that is upon the cal city of the balance mechanism being exceeded, the transfer of the l-correction to the tens transfer pinion of the units order is prevented. A mechanism which operates the same in principle, but which is of different form, is described in the l United States Patent to Bornkessel et al., No. 1,896,936, of February 7, 1933. According to the invention, the actuation of the tens transfer pinion of the units order, which actuation is caused only upon the positive or negative condition of the counting wheels of the balance mechanism changing and serving to transfer the additional unit, is eiected by an additional revolution of a step shaft,the rst revolution of which serves to cause the normal tens transfers.

With credit entries impressions are made on receipt forms which are printed in lieu of a book.

These entries are later entered in the book itself when the book is available. When in a booking operation the account sheet is not present, the respective impression is made on a spare sheet and the impression on the main sheet is likewise made later on. In these later booking operations the old balance and the entry paid in or paid out is likewise introduced in theu machine, whereupon the new balance is taken. As these tranactions have already been recorded in the respective totalizers in' the first booking operation, they must not be entered again in these supplemental booking operations. Therefore means '.10 are provided which cause, in a supplemental booking operation, merely an actuation of the balance mechanism, but not of the' totalizers, although Vtotalizer keys have been depressed in order to print the respective characters. According to the invention this is obtained by the action or a `special kind-of operation disc which action is tripped by setting vthe kind-of operation lever to the position Duplicate.

In order that the invention may be more readily understood, an embodiment of the same is illustrated by way of example in the drawings which accompany and form part of this specification.

In these drawings Figure 1 is a diagrammatic view of the keyboard of the machine,

Figure 2 is a longitudinal section through the balance mechanism on line II-II of Figure 3,

Figure 6a is a perspective View of adetail of thel tens-transfer mechanism,

Figure 7 is a cross section through the balance mechanism on line vir-vir of Figure 22,

Figure 8 is a similar section on line VIII-VIII of Figure 22,

Figure 9 is an elevation of the drive for theA transfer mechanism returning shaft,

Figure 10 is an elevation of the driving means for the step shaft,` e

Figure 10a shows a detail of Figure 10 on an enlarged scale, i*

Figures 11 and` 12 are further details of Figure 10,

Figure llais a perspective view of the pinion shown in Fig. 11,

Figure 13 is a cross section through the drive of the step shaft and return shaft,

teo

Figure 14 is a cross section on line XIV- XW of Figure 9, 4

Figures 15 to 20 show details of Figure 13,

Figure 21 is a longitudinal section through the balance mechanism on line Xin-XXI of Figure 3,

Figure 21a is the right-hand continuation of Figure 21,

Figure 22 is a longitudinal section through the right-hand end of the balance mechanism on line XXII- XXII of Figure '7,

Figure 23 is a similar section through the lefthand end thereof on line XXIII- XXIII of Figure 6,

Figure 24 is a cross section taken to the right of the bank of the main totalizer controlling keys together with the balance lever and controlling slide,

Figure 25 is a cross section taken to the right of the bank of the main totalizer controlling keys showing the actuating slide in moved position, but omitting the balance lever,

Figure 26 is a cross section taken toA the right of the motor key bank, together with .the controlling slide,

Figure 27 is a cross section taken to the right of they motor key bank, together with the coupling slide,V

Figure 28 is a section through the motor key bank and the device for shifting the rideraxle, looking from the rear of the machine,

Figure 28a is a developed view of the setting drum shown in Fig. 28, y

Figure 29 is a cross section through the entire -amount setting mechanism of the machine,

Figure 30 is a section through the kind-ofoperation and balance lever controlling mechanisms,

Figure 31 is a sectional elevation of Figure 30 showing the kind-of-operation lever controllingmechanism for the balance mechanism,

'and two keys 206, 201 for paid inand paid out- Figure 32 is a similar elevation showing the kind-of-operation lever controlling mechanism for the individual totalizers. l

Figure 33 is a, detail view of apart of the balance mechanism engaging means. 5

The keyboard, Figure 1, comprises eight rows or banks of amount keys 20I and two rows or banks of totalizer selecting keys 202, 203. The keys 202 serve toselect the credit totalizers for the introduction of paid-in-entries, while the keys 203 serve to select the debit totalizers for the introduction of paid-out-entries. A further row or bank of keys comprises a key 2 04 for positive old balances, a key 205 for negative old balances,

entries. The keyboard further comprises a motor key |44, a balance lever I2I serving to condition certain mechanism of the machine to take the new balance, and a kind-of-operation lever 38. The latter can be set to four positions, viz. 20 addition, sub-total or interim total, grand total, and duplicate. The machine is provided with a row of nine totalizers P (Fig. 29) for the Ypositive entries and another row of nine totalizers N (Fig. 29) for the negative entries. Furthermore, a 25 third row C (Fig. 29) comprising six control totalzers is provided which serve, respectively, to accumulate the positive and negativeold balances, the paid inand paid out-entries, and the positive and negative new balances. Each of the vthree groups 30 of totalizers have allotted to them a hand lever denoted by 208, 209, 2I0, respectively, which select the totalizer from which a total is to be taken. A fourth row B (Fig. 29) is formed by the balance mechanism which is thrown into co- 35 voperation in recording the old balances, the posi- `adding wheel I has fast on it a pinion 4 which is in mesl' with another pinion'5 fast on a hub 'I mounted on a shaft 6. The hub 1 has further fast on it a pinion 8 in mesh with a. broad pinion I0 loosely mounted on a shaft 9- (Fig. 22). Pinion I0 is further in mesh with a pinion I I fast on the hub I2 of the subtracting wheel 2. Upon j one of the two wheels being driven, a rotation to a likeextent but in an opposite direction is imparted to the other wheel.

The wheels I, 2 are further provided with internal teeth which may be engaged by the riders I4 mounted on the shiftable rider axle I3. The riders I4 are mounted on constrictions of axle I3 so as to take part in the axial shifting motion of the latter but freely turn thereon.

The axle la can be shifted into threey positions in which the riders I4 are in mesh either with the internal teeth of the adding Wheels, with thbse of the subtracting'wheels 2, or with 65 none of them.-

The Wheels I, 2 of each order are mounted on the extended hub |95 of a diierential wheel I6 which hub has a longitudinal slot I'I in which rider I4 may be shifted. That wheel with the 70 internal teeth of which the rider I4 is in mesh is thus coupled with the differential wheel I6. The latter is driven in accordance with the depression of the respective amount key of the order under consideration, the wheel 250, Figure 29, of which has been positioned correspondingly in the first period of the machine operation. Previous to the return of the set wheels 250 the balance mechanism is coupled with them by rocking it to such an extent that thek differential wheels I6 come into mesh with the tens transfer wheels I9 which are ecoentrically mounted on a shaft I8. The tens transfer wheels I9 are permanently in mesh, by intermediate wheels 2I loose on shaft 20, with the wheels 250.

Now, when in an addingoperation of the machine the wheels 250 have been positioned in accordance with the depressed amount keys 20 I and the differential wheels I6 have been coupled with the respective totalizer wheels, for instance with the adding wheels I, by the axle I3 being shifted in accordance with the depression Yof one of the special keys 204, 205, then the coupling of the balance mechanism takes place, in a manner shown herein, and also shown'and described in the United States patent No. 2,039,143, issued to Ernst Breitling on April 28, 1936, by rocking it into co-operative position, so that the 'difieren'- tial wheels I6 come into mesh with the tens transfer wheels I9, Figures 4 and 29. In the subsequent return of the wheels 250 the differential wheels I6 are turned clockwise, Figure 3, according to the position of the wheels A250. This rotation is transmitted in clockwise direction to the balance totalizer wheels coupled with the differential Wheels I8, in the present case to the adding wheels I. The other wheels, viz. the subtracting wheels 2, are turned to the same extent as the adding wheels I but in opposite direction, that is, counterclockwise.

With subtractive amount introduction the axle I3 is shifted to the left to such an extent, Figure 2, that the riders I4 couple the subtracting wheels 2 with the differential Wheels I6. The subtracting operation is the same as described for adding operations, with the only difference being that the subtracting wheels 2 are turned clockwise and the adding wheels I counter-clockwise.

The tens transfer mechanism is similar to that described in the specification of my co-pending application Serial No. 424,372, filed January 29th, 1930, which is adapted to the present balance mechanism. The German application corresponding to this U. S. application has matured into Patent No. 535,537, October 12, 1931.

Together with the rider axle la is sinned the shaft I8, Figures 2 and 3, on constrictions 22 of which are rotatably but not shiftably mountedthe companion tens teeth 23 in such a manner as to be opposite always to the corresponding rider I4 and to the coupled counting wheels I or 2. When a passage from 9 to 0 takes place in any order, the tens tooth Ia or 2a of the wheel 60 I or 2 strikes the companiomten's tooth 23 and rod 24 to its tens coupling member 2 5 in such a manner that it is held in position, and lupon shaft I8 being shifted it can slide in the recess of hub 25a, but a rotation about shaft I8 is executed by both these members in common and to the same extent. l

yEach tens coupling member 25 is provided on "75 its left-hand side with an extension 26 which cooperates with an extension 21 of an eccentric 28 loosely mounted on shaft I8 (Fig. 6a). The two stop faces 26a and 21a (Fig. 3) of these two extensions include an angle of 45 degrees which is equal to a preliminary movement of the member 25 independent of the eccentric 28, while the two other stop faces 2Gb and 2lb in the position of rest abut on one another (Fig. 3). Upon a rotation of 45 degrees of the companion tens tooth 23 in counterclockwise direction, Figure 5, the tens coupling member 25 is turned by this amount until face 26a of the extension 26 abuts `on face 2'Iaof the extension 21.

The tens coupling member 25 is yieldingly held locked in every position by a pawl 29, Figure 29. The locking disc 30 is fast on a hub 33 pinned to shaft 20a or 20h. The hub 33 has further fast on it a step disc 3I and a further locking disc 32.

The shafts 20a and 20h with the step discs and locking discs thereon receive, by a drive to be described hereinafter,` a rotation in several steps during which the tooth 3Ia of the step disc 3| by striking tooth 'I8 (Fig. 5) imparts a further counterclockwise rotation of 90 degrees to the tens coupling member 25that has already been turned 45 degrees by the preparatory operation, Figure 6. When this takes place, the eccentric 28 is also turned 90 degrees owing to the surfaces 26a and 21a abutting on one another (Fig. 6).

On the eccentric 20 is mounted the tens transfer pinion I9, Figures 2 and 4, which-is in mesh both with theamount intermediate Wheel 2I and with the differential actuating Wheel I6 of the next higher order. Upon the rotation of eccentric 28 by 90 degrees, the tens transfer pinion I9 r lle on the intermediate wheel 2|, which is at rest, and advances the differential actuating wheel I6 of the next higher order by one unit.

The members required for the differentiatintroduction of the amounts and for the tens transfer are present in each decimal order. This also is true for the appurtenant step discs 3|, Figure 2. As the tens transfers, beginning from the lowermost order, must follow each other continuously through all orders, the transfer places, that is the teeth 3Ia of the step discs 3|, are arranged in a helical line on the step shafts 20a and 20h, Figures 2 and 3. As with a high number of orders the angular distances between the transfer teeth would become too small: on step discs of normal size, the step shaft is divided into two parts 20a. and 20h. In the present embodiment the right-hand part 20a of the step shaft is allotted to the six lower orders of the balance mechanism, .while part 20h comprises the three highest orders thereof. This arrangement provides one more order in the balancing mechanism than there are rows of amount keys 20| and differential wheels 250.

For reasons to be explained hereinafter the balance mechanism requires a double actuation of the two-part step shafts, to which end the drive described hereinafter is provided. Furthermore, the members 25, 23, 28 which have been displaced in a tens transfer operation have to be moved back to initial position. This return motion is derived likewise from this drive.

35 denotes the driving shaft, Figures 9 and 13,

wheel 36 and with a wheel 39 of the same size loosely mounted on shaft 35. By setting the kindof-operation lever 38 to addition the shaft 40, Figure 9, and the cam groove segment 4| fast thereon are set in such a manner that the'antifriction roller 42 of pitman 43 comes to lie in the lowermost place of lthe cam groove 4|a, whereby pitman 43 is pulled downward. As will be seen from Figure 9, pitman 43 is connected to one arm of a lever 45 loose on shaft 44 the other arm of which carries the coupling pinion 31. Therefore, the pitman 43 moving downward, the pinion 31 comes into mesh with the gear wheels 36 and 39. Whenthe kind-of-operation lever 38 is set to one of the total taking positions, pitman 43 is moved upwards, whereby pinion 31 is disengaged from the gear wheels 36, 39, so that no actuation of the tens transfer mechanism takes place as explained hereinafter. Immediately after pinion 31 has been disengaged, a locking nose 45a of the right-hand arm of lever 45 engages and locks the wheel39, while a locking pawl 46 mounted on the other arm under spring actionholds the v'disengaged pinion 31 secured against rotation. l i The loose gear wheel 39 is rigidly connected to a gear wheel 41, Figures 9 and 13, which is in mesh with a gear wheel 48 loose on journal 44.

vWhen, as during addition, lthe wheels 36, 39 are '49 and locking disc 50 co-operate with a geark -wheel 52 fast on the return shaft 5|. In the plane of locking disc 50 wheel 52 has two lateral gaps 52a and 52h and in the plane of wheel 49 two lateral gaps 52o and 52d, which gaps are each formed by two successive teeth being cutaway by half their width. In the position of rest the locking face 50aI of disc 56 engages the the gap 52a and thus locks wheel 52 against rotation. Upon wheel 49 rotating counterclockwise, face 50a releases wheel 52 as soon as the rst tooth 49d of the teeth 49a strikes the half tooth 521. Wheel 52 is thereupon turned by the teeth 49a until the locking face 49o enters gap 52e and locks wheel 52 after a revolution of about 120 degrees. Toward the end of the operation ofthe machine the face 50h strikes tooth 52g and imparts to wheel 52a further rotation of about 60 degrees until wheel 52 and the return shaft 5| are again locked ,by the locking surface 50a. entering gap 52h.

'Ihe return shaft 5|, Figure 21, extends across the .entire length of the balance mechanism and has mounted on it the mutilatedr return pinions 53 belonging to the individual decimal orders. By means of the two groups of teeth 53a, 53h, Figure 3, on pinions 53, the parts displaced in a tens transfer operation are returned to initial position at the beginning of the next machine operation. Each tens coupling member 25 has on itsl right-hand end a group vof five teeth 25h, Figures 4 and 6a, in mesh with a wheel 55 mounted on shaft 54 and rotated clockwise by about |20 degrees upon rotation of member 25. The return pinion 55 is fast on a hub 56, Figure 21, loose on shaft 54 on which hub is fixed a return wheel 51, Figure 3. The teeth 51b of the latter are adapted to co-operate with the groups of teeth Maand 53h of return pinion 53. During the tens transfer yoperation the return wheel 51, Figures 5 and 6, is also rotated clockwise by about 120 degrecs. It can execute this rotation unhindered as no teeth of pinion 53 are opposite the teeth 51h. 'I'he clockwise rotation of the return shaft 5|, Figure 6, starts at the beginning of the next machine operation and it is now that one of the groups of teeth 53a or 53h of return pinion 53 engages the teeth 51h of wheel 51 and returns wheel 55 and therewith the tens coupling member 25 back to its initial position, whereby the companion tens tooth 23 is also returned to operative position and is thus ready for 'the preparation of a new tens transfer.

The two-part step shaft 20a., 2Gb is drivenfrom the driving shaft 35 through wheel 36 rigid thereon, coupling pinion 31 and wheel 394 loose on shaft 35, Figures 9 and 13. Beside wheel 39 is xed a set of three actuating and locking discs 58, 59, 60 which make a continuous full re/volution during the machine operation, and co-operate with a pinion 62 (Fig. 11a) mounted on shaft 6| in such a manner that pinion 62 is alternatively turned and locked by the discs 58, 59, 60, Figures 10,' 11, 13'. In the position of rest the locking face 58a of disc 58 engages a gap 62a of pinion 62, Figure 11, and thus locks the latter. Shortly after the set of discs 58, 59, 60 has begun rotating, the face 59a of disc 59 strikes tooth 62h and turns pinion 62 by 30 degrees so that the locking face 59h engages gap 62e and pinion 62 is locked again. Thereupon the face 60a of disc 60 engages the tooth 62d and turns pinion 62 farther by 30 until the locking face 66h engages the gap 62j whereby pinion 62 is locked anew. Upon further rotation of the set of discs the face 59o of disc 59 strikes the tooth 62g and thereby turns pinion 62 so far that it engages the teeth 53h. Hereby a last rotation of pinion 62 by 300 degrees` is caused until it is locked in its initial positionby the locking face 58a entering gap 62a.-

During a machine operation the pinion 62 thus has made a full counterclockwise rotation, but in three sections, viz. of 30 degrees, 30 degrees and 300 degrees. The pinion 62 has fixed to it a set of six actuating and locking discs 63, 64, 65, 66, 61, 68, of which the discs 63, 64, 65 co-operate with a pinion 69, while discs 66, 61, 68 co-operate with a pinion`10, Figures 10, 12, 13.

In the position of rest the locking face 65a, Figures 10 and 15 to 17, of the locking disc 65 engages the gap 69a of pinion 69 and locks it against Vbeing turned. At the commencement of the rotation of pinion 62 and set of discs 63 to 68 rigid therewith, the face 63a of disc 63 strikes `the tooth 69h and turns pinion 69 by 30 degrees clockwise, so that the locking face 63D engages gap 69e whereby pinion 69 is locked. Thereupon the face 64a of disc 64 strikes tooth 69d and turns piston 69 by 30 degrees more until the locking face64b engages gap 69f whereby pinion 69 is locked again. In the further course of the rotation of the-set of discs the tooth 63o strikes tooth 69g and brings the two teeth 65h and 65e intomesh with the gaps 69h and 692'. Tooth 63h thereupon turns pinion 69 so far that the locking face 65 can engage gap 69p. Pinion 69 is thus locked again after this partial rotation of 150 degrees. until tooth 63f strikes tooth 69k. In this last section of motion the teeth 65T and 65g come to engage the teeth 69m, 69u, 69o of pinion 69 and tooth 63gy turns pinion 69 so far that after this Afurther partial rotation by 150 degrees it is locked again by locking face 65a again engaging gap 69a. In this way pinion 69 has made a full revolutionin clockwise direction, but in four sections, viz. of 30, 30, 150, and 150 degrees.

In a similar manner co-operate the other actuating and locking discs 66, 61, 68 with the pinion 10, Figures 12 and 18 to 20. The two faces 66a and 61a of the discs 66 and 61 impart to pinion 10 two successive' partial motions. of 30 degrees each, the teeth 68a in connection with the teeth 66e and, l66e impart to it 'a full revolution of 360 degrees, and the teeth 68h impart to it al partial rotation of 300fdegrees', after which pinion10 is returned to initial position and is again locked by locking face 68e engaging gap 10a. Pinion 10 thus executes during an entry operation, two full revolutions, butin four sections, of 30, 30, 360 and 300 degrees.

- As already mentioned the step shaft consists of two parts 20a and 20h. On the left-hand end of part 20h, Figure 21, is fixed pinion 69 which transmits its revolution of 360 composed of four sections, directly to shaft partl 20h. The double revolution of pinion 10 of four sections is transmitted to par-t 20a. For this purpose pinion 10 is loosely mounted by means of a long hub 1| on pa 20h, Figure 21. Hub 1| has rigid on its other end a wheel 12 in mesh with awheel 13 fixed on shaft 54. Shaft 54 has rigid on it near its righthand enda wheel 14 in mesh with a wheel 15 fast to shaft part 20a through hub 33 and thus transmtting the stepwise double rotation of pinion 10 to part 20a.

On the right-hand part 20a of the step shaft, Figures 2 and 2a, are fixed six groups of step and locking discs allotted to the six lowermost decimal orders. Like the groups illustrated in Figure 2 lfor the part 20h of the step shaft, these groups are composed each of a hub 33 fixed on part 20a and carrying a return locking disc 32, a step disc 3| and an eccentric locking disc 30. Each step disc 3|, Figure 7, is provided with a tooth 3|a, a circumferential locking face 3|b, and a gap 3|c.

Each eccentric locking di'sc 30, Figures 5 and 6,

is provided with a locking face 30a, a gap 30h, a circumferential locking face 30e, and a recess 30d. The return locking discs 32 possess only a short locking face 32a, Figures 3, 5. On the left-hand their periphery two actuatingplaces that is two teeth 3|a and 3|a, two locking faces 3|b and 3 Ib and two gaps 3|c and 3|c, Figures 3, 5, 6.

In the position of rest, Figure 3, the step disc 3| llocks the tens coupling member against clockwise rotation, by the locking face 3|b abutting on tooth 16 of member 25. AThis tooth'16 is the first of a group 25c formed by three teeth 16, 18, 19, Figures 2 and 6. Member 25 is further secured against counterclockwise rotation by its teeth 2527, Figure 4, being in mesh with the return pinion 55 while the wheel 51, Figure 3, by the tooth 51a, abuts on the locking face 32a of the return locking disc 32. When the first partial rotation is imparted to the step shaft, .the tens coupling member 25 and return pinion 55 are released by the locking faces 3|b and 32a moving out of the Apath of pinion 25 and pinion l55, respectively.

Thereupon takes place the return motion of about 150 degrees effected by the return shaft 5|, but this motion has no effect ii' no tens transfer has taken place previously, that is if no teeth of wheel 51 are opposite the return discs 53, Figure 3.

In the second partial rotation of the step shaft part by degrees the locking face 30a of the eccentric locking disc 30 comes to abut on the face 28a of the eccentric 28, Figure 5, and locks it during the introduction of the amount.

Now when a passage from 9 to 0 takes place in the amount introduction in one or more orders, the tens coupling member 25 is turned 45 degrees in counterclockwise direction, as described, Figure 5. Upon the step shaft 20 making its further rotation ofy 360 or 150 degrees, tooth 3| a advances member 25 that has already been turned degrees, by 90 degrees, Figure 6. 'I'hose tens.

coupling members which have not been displaced in the preparatory operation are not turned by the step discs 3|, as the latter when rotating can freely pass through the gap existing between the teeth 16 and 18 of pinion 25, Figure 3. The return pinion 55, which is in mesh with member 25 is entrained correspondingly togetheruwith wheel 51Figures 3, 4, 5, 6 upon rotation of member 25, so that the teeth 51h are brought into the path of the teeth of return pinion 53, Figure 6. After the tens coupling member 25 has been turned 90 degrees by tooth 3|a, Figure 6, face 3|b locks member 25 until the latter is released again by recess 3|c but even then the member 25 is yieldingly held locked by the pawl 29, Figure 29. If no change of sign of the balance takes place in the balance mechanism, the teeth 3|a and 3|a', 30

respectively, of the step discs pass in the last partial rotation of the step shaft parts past member 25 without affecting it. At the end of the machine operation the locking faces 3|b of the step discs lock against clockwise rotation both the tens coupling members 25 which have been displaced by 135 degrees and the non-displaced ones. In the rst case tooth 19 abuts against the locking face 3|b, in the latter case, tooth 16.

The return of the displaced tens coupling members takes place at the commencement of the next machine operation. After the first partial rotation of the step shaft parts 20a and 20h by 30 degrees, whereby the locked state of the members 25 has been eliminated, the clockwise rotation of the return shaft 5|, Figures 6 and 23, comes into effect in so far as the return Lpinions 53 fast thereon engage by one of their groups of teeth 53a or 53h the teeth 51h of the displaced return wheels51 and turn the latter together with the return pinions counterclockwise to such an extent that the tens coupling members 25 in mesh with the latter and the eccentrics 28 are removed to initial position, Figure 3, whereupon the members are ready for a new tens transfer.

When the totalizer constituting the balance mechanism contains a positive amount and the capacity of the balance mechanism is exceeded by the entry of an additional amount, a passage from '9 to 0 takes place in the highest decimal order. This passage can only be effected by a tens transfer, as no row of amount keys and no amount differential wheels 250 are allotted to the highest order of the balancemechanism.

' The tens tooth la of the adding wheel of the highest 'orde'r, Figures 2, 3, 23, strikes in this Atransfer the companion tens tooth 23a` of the having a longitudinal slot engaged by a pin 8| rigid on shaft I8, so that sleeve 80 does not par- 

